According to the 2011 census of India, Nkialwa has 338 households. The effective literacy rate (i.e. the literacy rate of population excluding children aged 6 and below) is 55.93%.[2]
Demographics (2011 Census)[2]
| Total | Male | Female |
| Population | 1680 | 909 | 771 |
| Children aged below 6 years | 239 | 126 | 113 |
| Scheduled caste | 0 | 0 | 0 |
| Scheduled tribe | 1590 | 862 | 728 |
| Literates | 806 | 466 | 340 |
| Workers (all) | 1299 | 705 | 594 |
| Main workers (total) | 996 | 538 | 458 |
| Main workers: Cultivators | 962 | 515 | 447 |
| Main workers: Agricultural labourers | 0 | 0 | 0 |
| Main workers: Household industry workers | 0 | 0 | 0 |
| Main workers: Other | 34 | 23 | 11 |
| Marginal workers (total) | 303 | 167 | 136 |
| Marginal workers: Cultivators | 299 | 166 | 133 |
| Marginal workers: Agricultural labourers | 0 | 0 | 0 |
| Marginal workers: Household industry workers | 0 | 0 | 0 |
| Marginal workers: Others | 4 | 1 | 3 |
| Non-workers | 381 | 204 | 177 |